CHICAGO  The Miami Dolphins still look out for their own. It wasn't quite the drama of Dan Marino tossing easy touchdowns against the '85 Bears on Monday Night Football, but once again, Miami pulled off an upset to spoil Chicago's bid for an undefeated season.

Miami Dolphins defensive end Jason Taylor had dinner Saturday night with Brian Urlacher, his all-pro counterpart from the Chicago Bears.

Did Urlacher pay? "Absolutely," Taylor said with a huge grin. "It's his town."

The Bears linebacker paid in another way Sunday, as Taylor and his Dolphins teammates took temporary ownership of Soldier Field, ending Chicago's 10-game regular-season home winning streak over two seasons and handing the NFC North Division leaders their first loss of the year with a convincing 31-13 victory.

Taylor, a friend of Urlacher's, was the catalyst for the 2-6 Dolphins' stunning upset, returning an interception for a touchdown in the second quarter and forcing a fumble by quarterback Rex Grossman, who was harassed by the Miami pass rush all game.

The Dolphins forced six Chicago turnovers, leading to 28 of their 31 points.

"We had a lot of things that went wrong," Bears coach Lovie Smith said.

Rough day for Grossman

Grossman suffered his second poor game in his last three outings, completing 18 of 42 passes for 210 yards and one TD with three interceptions and three sacks, including the lost fumble. He had a six-turnover performance vs. Arizona Oct. 16, but the Bears' defense and special teams pulled the game out.

In the second half Sunday, with the Miami pass rush at full throttle, he was 11-for-27 for 91 yards with two interceptions, frequently throwing off balance.

"We definitely were in his face and he was having to get rid of the ball quickly," Miami linebacker Zach Thomas said.

"There were a couple of times where it was just a bad throw, and then other ones where there was miscommunication (with receivers) a little bit," said Grossman, making his 15th career regular-season start.

The Bears won their first four home games this year by an average of 30.7 points, behind a defense and special teams that entered the day tied for the NFL lead in takeaways. The Chicago defense, No. 1 in the league, intercepted Miami quarterback Joey Harrington twice, leading to 10 points.

But running back Ronnie Brown gained a career-high 157 yards on 29 carries, the most any back has gained against the Bears this year, to help keep Miami out of third-and-long situations most of the day.

"We watched games and saw some teams had success running the football against them," Brown said.

"We were not going to let their defense get the momentum," Harrington said of the Dolphins' game plan on offense. "The games that Chicago has blown wide-open are games in which the other team has allowed the defense to make big plays. ... We were going to force their offense to have to drive the length of the field to beat us."

Tale of two cities

The talk coming into the game was about two cities linked by history and opposite starts to this season.

The 7-0 Bears tried to ignore the growing comparisons with the 1985 Super Bowl championship team, which won its first 12 games.

The Dolphins, who had a bye last Sunday, listened to two weeks of intense criticism for their 1-6 start, including some from members of the 1972 Miami team that recorded the only perfect season in modern NFL history. Former guard Bob Kuechenberg told the Chicago Tribune these Dolphins "do not have a soul" and a victory at Soldier Field was "not even remotely possible."

After Sunday, the Bears still have one thing in common with the 1985 team: their unbeaten streak was stopped by a Miami club. The Dolphins' 38-24 victory was the only blemish on that Bears team's record.

The current-day Dolphins weren't looking to do any favors for the old-timers, though. They were looking to end a siege against their reputations.

"It wasn't a soap opera. It was a lot of disrespect," Taylor said of the criticism. "A lot of people in the whole country didn't give us a chance. ... It's good sometimes to say, 'How do you like me now?' "

"We should be criticized the way we were playing. ... (Say) we're playing horrible, that's fine," he said. "But when you question your team's heart and you're an alumni, I thought that was going overboard."

Taking control early

The Dolphins played intensely from the start but trailed 3-0 after the first quarter. But a 1-minute, 40-second span early in the second quarter let the 62,206 Bears faithful know this wasn't going to be another Soldier Field blowout.

On the first play of the Bears' ensuing possession, Taylor made a leaping interception of a Grossman pass near the line of scrimmage and ran 20 yards for the touchdown.

"Actually, I fell for the fake. I thought it was a run play," Taylor said. "I came back out when I saw Grossman pull the fake. He threw it, and I put my hands up. I think it just happened to land in my hands."

The Bears closed to 14-10 at the half, on a 30-yard Grossman pass to Muhsin Muhammad, but any thought of their taking control in the second half lasted one play.

On the first play from scrimmage of the half, Bears receiver Justin Gage fumbled after a 17-yard gain, and Miami cornerback Andre Goodman returned it 33 yards to the Chicago 12.

Harrington hit Wes Welker for a 6-yard TD and 21-10 lead to put the Dolphins in command.

Urlacher left the game in the fourth quarter with a foot injury, the extent of which was not immediately known.

The Bears also lost wide receiver Bernard Berrian, their main deep threat, to a rib injury on their first possession.